SQLÖØ¸´¼Ç¼²éѯɾ³ý
1
¡¢²éÕÒ±íÖжàÓàµÄÖØ¸´¼Ç¼£¬Öظ´¼Ç¼ÊǸù¾Ýµ¥¸ö×ֶΣ¨peopleId£©À´ÅжÏ
select
*
from
people
where
peopleId
in
(
select
peopleId
from
people
group
by
peopleId
having
count
(peopleId)
>
1
)
2
¡¢É¾³ý±íÖжàÓàµÄÖØ¸´¼Ç¼£¬Öظ´¼Ç¼ÊǸù¾Ýµ¥¸ö×ֶΣ¨peopleId£©À´Åжϣ¬Ö»ÁôÓÐrowid×îСµÄ¼Ç¼
delete
from
people
where
peopleId
in
(
select
peopleId
from
people
group
by
peopleId
having
count
(peopleId)
>
1
)
and
rowid
not
in
(
select
min
(rowid)
from
people
group
by
peopleId
having
count
(peopleId )
>
1
)
3
¡¢²éÕÒ±íÖжàÓàµÄÖØ¸´¼Ç¼£¨¶à¸ö×ֶΣ©
select
*
from
vitae a
where
(a.peopleId,a.seq)
in
(
select
peopleId,seq
from
vitae
group
by
peopleId,seq
having
count
(
*
)
>
1
)
4
¡¢É¾³ý±íÖжàÓàµÄÖØ¸´¼Ç¼£¨¶à¸ö×ֶΣ©£¬Ö»ÁôÓÐrowid×îСµÄ¼Ç¼
delete
from
vitae a
where
(a.peopleId,a.seq)
in
(
select
peopleId,seq
from
vitae
group
by
peopleId,seq
having
count
(
*
)
>
1
)
and
rowid
not
in
(
select
min
(rowid)
from
vitae
group
by
peopleId,seq
having
count
(
*
)
>
1
)
5
¡¢²éÕÒ±íÖжàÓàµÄÖØ¸´¼Ç¼£¨¶à¸ö×ֶΣ©£¬²»°üº¬rowid×îСµÄ¼Ç¼
select
*
from
vitae a
where
(a.peopleId,a.seq)
in
(
select
peopleId,seq
from
vitae
group
by
peopleId,seq
having
count
(
*
)
>
1
)
and
rowid
not
in
(
select
min
(rowid)
from
vitae
group
by
peopleId,seq
having
count
(
*
)
>
1
)
(¶þ)
±È·½Ëµ
ÔÚA±íÖдæÔÚÒ»¸ö×ֶΓname”£¬
¶øÇÒ²»Í¬¼Ç¼֮¼äµÄ“name”ÖµÓпÉÄ
Ïà¹ØÎĵµ£º
1.Ìõ¼þ¿ØÖÆ
1.1 if .. then .. end if
if Ìõ¼þ then
Óï¾ä¶Î£»
end if;
1.2 if .. then .. else .. end if
if Ìõ¼þ then
Óï¾ä¶Î£»
else
Óï¾ä¶Î£»
end if;
1.3 ifǶÌ×
2.Ñ»·¿ØÖÆ
2.1 loop .. exit .. end loop
loop
& ......
Oracle9iÒì³£´¦Àí·ÖΪϵͳԤ¶¨ÒåÒì³£´¦ÀíºÍ×Ô¶¨ÒåÒì³£´¦ÀíÁ½²¿·Ö¡£
×Ô¶¨ÒåÒì³£´¦Àí
1.¶¨ÒåÒì³£´¦Àí
declare Òì³£Ãû exception;
2.´¥·¢Òì³£´¦Àí
raise Òì³£Ãû
3.´¦ÀíÒì³£
exception
when Òì³£Ãû1 then
Òì³£´¦ÀíÓï¾ä¶Î1;
when Òì³£Ãû2 then
Òì³£´¦ÀíÓï¾ä¶Î2;
ʾÀý£º
se ......
µ¼ÈëµÄÏêϸÁ÷³Ì
1¡¢Ð½¨Ò»¸öÊý¾Ý¿â
2¡¢ÔÚеÄÊý¾Ý¿âÉϵãÓÒ¼ü-¡·“ËùÓÐÈÎÎñ”-¡·“µ¼ÈëÊý¾Ý¿â”£¬µãÏÂÒ»²½
3¡¢Ê²Ã´¶¼²»Òª¸Ä£¬ÔÚÊý¾Ý¿âÖÐÑ¡ÔñÄǸö¾ÉµÄÊý¾Ý¿â£¬µãÏÂÒ»²½
4¡¢ÔÚÕâ¸ö½çÃæµÄÊý¾Ý¿âÖÐÑ¡ÔñÄãн¨µÄÊý¾Ý¿â£¬µãÏÂÒ»²½
5¡¢Ñ¡Ôñ“ÔÚSQL SERVERÊý¾Ý¿âÖ®¼ä¸´ÖƶÔÏóºÍÊý¾Ý”£¬µãÏÂÒ»²½
......
What is SQL*Plus and where does it come from?
SQL*Plus is a command line SQL and PL/SQL language interface and reporting tool that ships with the Oracle Database Client and Server software. It can be used interactively or driven from scripts. SQL*Plus is frequently used by DBAs and Developers ......
Ò»¡¢ ×¢Èëʽ¹¥»÷µÄÀàÐÍ
¡¡¡¡¿ÉÄÜ´æÔÚÐí¶à²»Í¬ÀàÐ͵Ĺ¥»÷¶¯»ú£¬µ«ÊÇÕ§¿´ÉÏÈ¥£¬Ëƺõ´æÔÚ¸ü¶àµÄÀàÐÍ¡£ÕâÊǷdz£ÕæÊµµÄ-Èç¹û¶ñÒâÓû§·¢ÏÖÁËÒ»¸öÄܹ»Ö´Ðжà¸ö²éѯµÄ°ì·¨µÄ»°¡£±¾ÎĺóÃæ£¬ÎÒÃÇ»á¶Ô´Ë×÷ÏêϸÌÖÂÛ¡£
¡¡¡¡Èç¹ûÄãµÄ½Å±¾ÕýÔÚÖ´ÐÐÒ»¸öSELECTÖ¸ÁÄÇô£¬¹¥»÷Õß¿ÉÒÔÇ¿ÆÈÏÔʾһ¸ö±í¸ñÖеÄÿһÐмǼ-ͨ¹ý°ÑÒ»¸öÀýÈç"1=1"Õâ ......